Thompson, now 28, tells Ross her California swim coach began to abuse her at age 15.

"He told me that he could give me the recipe to being an Olympics swimmer, so I trusted him that he wouldn't hurt me, that he would take me to the Olympics," Thompson, who entered law enforcement after quitting swimming, tells Ross. "So what he said was what I believed, and I didn't know any better."

Sex Abuse Lawsuit Against USA Swimming

Her coach even humiliated her at practice by making her wear a dog collar with a leash attached to it, which her coach held while she swam laps at the pool, Thompson says.

Thompson and her attorney Robert Allard call for leadership change at USA Swimming, saying the nation's governing body of the sport has not fulfilled its promise to implement better athlete protection measures.

"They've had their chance," Allard tells Ross. "The response uniformly to these complaints has been to keep it confidential and to not reach out to the victims."

Also on this week's show, Ross takes viewers inside the bizarre saga of supermodel Naomi Campbell and the blood diamonds from a dictator she tried to lie about.

Did Naomi Campbell Tell The Truth?

And ABC News Senior Investigative Reporter Richard Esposito joins Ross in the New York studios to discuss new violent tactics of Mexico's ruthless drug cartels previously seen in Iraq: car bombs. Tune in to find out why Americans could be in danger.

"Brian Ross Investigates" is a weekly 30-minute investigative news magazine show that features exclusive interviews, undercover videos and extended investigations and story updates.

"The show is part of our expanded digital efforts in this new age of news," Ross said. "It's an exciting venture that we hope will allow viewers to interact with our investigative team and offer input as we continue reporting."

"Brian Ross Investigates" airs every Friday on Hulu.com - CLICK HERE TO WATCH THE FULL EPISODES - and ABC News Now, the network's 24-hour news channel available throughout the U.S. and Europe, at 1:36pm. Each show is also available on mobile devices, including the iPhone and iPad.

Mexican Drug Cartels Are Using Car Bombs

Viewers can submit videos and personal thoughts on controversial issues and current topics through Facebook and Twitter, including the "Skype Gripe" segment, in which viewers are invited to interact with Ross about recent investigations.